engine loom question
Discussion
Was at the ring over the weekend, and the car had a fairly large under bonnet fire 
f**king plumbed electronic extinguisher failed to go off but 3 of us got the fire out in about 20 secs. It's destroyed most of the wiring loom, and melted the cam belt, dry sump pump belt etc, etc (oh, yes, and the bonnet!)
Quick q: I'm planning on switching to 45mm DTH Jenveys now, and was curious what the large black plug on the top of my existing inlet manifold (VPHD engine) does. I've had a look at some wiring diagrams and can't see what its function is? Any ideas? It's an EU2 variant K series btw.
Also, anyone got a second hand bonnet (w/o the heater vents at the back, i.e. only 6 sets of louvres rather than seven) they want to sell me? Condition not important.
f**king plumbed electronic extinguisher failed to go off but 3 of us got the fire out in about 20 secs. It's destroyed most of the wiring loom, and melted the cam belt, dry sump pump belt etc, etc (oh, yes, and the bonnet!)Quick q: I'm planning on switching to 45mm DTH Jenveys now, and was curious what the large black plug on the top of my existing inlet manifold (VPHD engine) does. I've had a look at some wiring diagrams and can't see what its function is? Any ideas? It's an EU2 variant K series btw.
Also, anyone got a second hand bonnet (w/o the heater vents at the back, i.e. only 6 sets of louvres rather than seven) they want to sell me? Condition not important.
Oopsie! Bloody plumbed extinguishers, mine didn't go off after my crash at Spa (although that could be attributed to it being fitted in the boot which was dispersed evenly across the track)... you spend all that time looking at that big red handle resisting the insatiable urge to yank it, then when the bloody thing finally catches fire it doesn't work!
That sensor is an Manifold Air Pressure (MAP) sensor, and your car wont run properly (if at all) without it. Make sure you get one in good health as they can play up.
That sensor is an Manifold Air Pressure (MAP) sensor, and your car wont run properly (if at all) without it. Make sure you get one in good health as they can play up.
cheers. forgot to add, i'm using an emerald ecu, so I don't think all the sensors are needed. I know the IACV isn't for example....
If I swap to Jenveys, how is the MAP measured? Surely all you need to know is the rpm and TPS level to produce a fuel/ign map?
If I swap to Jenveys, how is the MAP measured? Surely all you need to know is the rpm and TPS level to produce a fuel/ign map?
Edited by fergus on Monday 30th June 13:37
Ahhh, yes! That would explain it!
As you don't have a plenum with throttle bodies, you don't really need an inlet pressure reading. You do preferably need air density however to adjust for hot/cold/high altitude conditions.
There two ways of doing this, the most common is a simple air temperature sensor near the inlet, the other (and i've never actually seen it, only heard of it) is to have a mass air flow meter on one of the pots, which is used to 'guess' the fuelling for the other three cylinders.
As you don't have a plenum with throttle bodies, you don't really need an inlet pressure reading. You do preferably need air density however to adjust for hot/cold/high altitude conditions.
There two ways of doing this, the most common is a simple air temperature sensor near the inlet, the other (and i've never actually seen it, only heard of it) is to have a mass air flow meter on one of the pots, which is used to 'guess' the fuelling for the other three cylinders.
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